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Trumm M, Tasi A, Schnurr A, DiBlasi NA, Gaona X. Structural characterisation of hydrolysed Cm(III)-EDTA solution species under alkaline conditions: a TRLFS, vibronic side-band and quantum chemical study. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2033864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. Trumm
- Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie, Karlsruhe, Germany
| | - A. Tasi
- Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie, Karlsruhe, Germany
| | - A. Schnurr
- Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie, Karlsruhe, Germany
| | - N. A. DiBlasi
- Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie, Karlsruhe, Germany
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, IN, USA
| | - X. Gaona
- Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie, Karlsruhe, Germany
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Maiwald MM, Trumm M, Dardenne K, Rothe J, Skerencak-Frech A, Panak PJ. Speciation, thermodynamics and structure of Np(V) oxalate complexes in aqueous solution. Dalton Trans 2020; 49:13359-13371. [PMID: 32955047 DOI: 10.1039/d0dt02379e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The speciation, thermodynamics and structure of the Np(v) (as the NpO2+ cation) complexes with oxalate (Ox2-) are studied by different spectroscopic techniques. Near infrared absorption spectroscopy (Vis/NIR) is used to investigate complexation reactions as a function of the total ligand concentration ([Ox2-]total), ionic strength (Im = 0.5-4.0 mol kg-1 Na+(Cl-/ClO4-)) and temperature (T = 20-85 °C) for determination of the complex stoichiometry and thermodynamic functions (log β0n(T), ΔrH0n, ΔrS0n). Besides the solvated NpO2+ ion, two NpO2+ oxalate species (NpO2(Ox)n1-2n; n = 1, 2) are identified. With increasing temperature a decrease of the molar fractions of the 1 : 1 - and 1 : 2 - complexes is observed. Application of the law of mass action yields the temperature dependent conditional stability constants log β'n(T) at a given ionic strength which are extrapolated to IUPAC reference state conditions (Im = 0) according to the specific ion interaction theory (SIT). The log β0n(T) values of both complex species (log β01(25 °C) = 4.53 ± 0.12; log β02(25 °C) = 6.22 ± 0.24) decrease with increasing temperature confirming an exothermic complexation reaction. The temperature dependence of the thermodynamic stability constants is described by the integrated van't Hoff equation yielding the standard reaction enthalpies (ΔrH01 = -1.3 ± 0.7 kJ mol-1; ΔrH02 = -8.7 ± 1.4 kJ mol-1) and entropies (ΔrS01 = 82 ± 2 J mol-1 K-1; ΔrS02 = 90 ± 5 J mol-1 K-1) for the complexation reactions. In addition, the sum of the specific binary ion-ion interaction coefficients Δε0n(T) for the complexation reactions are obtained from SIT modelling as a function of the temperature. The structure of the complexes and the coordination mode of oxalate are investigated using EXAFS spectroscopy and quantum chemical calculations. The results show, that in case of both species NpO2(Ox)- and NpO2(Ox)23-, chelate complexes with 5-membered rings are formed.
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Affiliation(s)
- M M Maiwald
- Ruprecht Karls Universität Heidelberg, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany.
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Maiwald MM, Müller K, Heim K, Trumm M, Banik NL, Rothe J, Dardenne K, Skerencak-Frech A, Panak PJ. Determination of thermodynamic functions and structural parameters of NpO 2+ lactate complexes. NEW J CHEM 2020. [DOI: 10.1039/d0nj04291a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work is a detailed spectroscopic and quantum chemical study on the complexation of Np(v) with the α-hydroxy carboxylate lactate giving information on the complex stoichiometries and thermodynamics (log β, ΔH, ΔS).
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Affiliation(s)
- M. M. Maiwald
- Ruprecht Karls Universität Heidelberg
- Physikalisch-Chemisches Institut
- Im Neuenheimer Feld 253
- D-69120 Heidelberg
- Germany
| | - K. Müller
- Helmholtz-Zentrum Dresden-Rossendorf
- Institut für Ressourcenökologie
- 01328 Dresden
- Germany
| | - K. Heim
- Helmholtz-Zentrum Dresden-Rossendorf
- Institut für Ressourcenökologie
- 01328 Dresden
- Germany
| | - M. Trumm
- Karlsruher Institut für Technologie (KIT)
- Institut für Nukleare Entsorgung (INE)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - N. L. Banik
- Joint Research Center JRC - Karlsruhe
- G.II.6 - Nuclear Safeguards and Forensics
- European Commission
- D-76125 Karlsruhe
- Germany
| | - J. Rothe
- Karlsruher Institut für Technologie (KIT)
- Institut für Nukleare Entsorgung (INE)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - K. Dardenne
- Karlsruher Institut für Technologie (KIT)
- Institut für Nukleare Entsorgung (INE)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - A. Skerencak-Frech
- Karlsruher Institut für Technologie (KIT)
- Institut für Nukleare Entsorgung (INE)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - P. J. Panak
- Ruprecht Karls Universität Heidelberg
- Physikalisch-Chemisches Institut
- Im Neuenheimer Feld 253
- D-69120 Heidelberg
- Germany
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Stoll M, Huber FM, Trumm M, Enzmann F, Meinel D, Wenka A, Schill E, Schäfer T. Experimental and numerical investigations on the effect of fracture geometry and fracture aperture distribution on flow and solute transport in natural fractures. J Contam Hydrol 2019; 221:82-97. [PMID: 30712982 DOI: 10.1016/j.jconhyd.2018.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 10/22/2018] [Accepted: 11/20/2018] [Indexed: 06/09/2023]
Abstract
The impact of fracture geometry and aperture distribution on fluid movement and on non-reactive solute transport was investigated experimentally and numerically in single fractures. For this purpose a hydrothermally altered and an unaltered granite drill core with axial fractures were investigated. Using three injection and three extraction locations at top and bottom of the fractured cores, different dipole flow fields were examined. The conservative tracer (Amino-G) breakthrough curves were measured using fluorescence spectroscopy. Based on 3-D digital data obtained by micro-computed tomography 2.5-D numerical models were generated for both fractures by mapping the measured aperture distributions to the 2-D fracture geometries (x-y plane). Fluid flow and tracer transport were simulated using COMSOL Multiphysics®. By means of numerical simulations and tomographic imaging experimentally observed breakthrough curves can be understood and qualitatively reproduced. The experiments and simulations suggest that fluid flow in the altered fracture is governed by the 2-D fracture geometry in the x-y plane, while fluid flow in the unaltered fracture seems to be controlled by the aperture distribution. Moreover, we demonstrate that in our case simplified parallel-plate models fail to describe the experimental findings and that pronounced tailings can be attributed to complex internal heterogeneities. The results presented, implicate the necessity to incorporate complex domain geometries governing fluid flow and mass transport into transport modeling.
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Affiliation(s)
- M Stoll
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany; Friedrich-Schiller-University Jena (FSU), Institute of Geosciences, Applied Geology, Burgweg 11, 07749 Jena, Germany.
| | - F M Huber
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - M Trumm
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - F Enzmann
- Johannes Gutenberg-University, Geosciences Institute, J.-J. Becherweg 21, 55099 Mainz, Germany
| | - D Meinel
- Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - A Wenka
- Karlsruhe Institute of Technology (KIT), Institute for Micro Process Engineering (IMVT), 76021 Karlsruhe, Germany
| | - E Schill
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany; Technical University of Darmstadt, Institute of Applied Geoscience, Schnittspahnstraße 9, 64287 Darmstadt, Germany
| | - T Schäfer
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany; Friedrich-Schiller-University Jena (FSU), Institute of Geosciences, Applied Geology, Burgweg 11, 07749 Jena, Germany
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Trumm M, Wagner C, Schimmelpfennig B, Geist A, Panak PJ. A closer look on the coordination of soft nitrogen-donor ligands to Cm(iii): SO3-Ph-BTBP. Dalton Trans 2016; 45:12308-11. [DOI: 10.1039/c6dt02052f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The combination of theory, VSBS and TRLFS revealed new insights into the coordination structure of [Cm(SO3-Ph-BTBP)2]5−.
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Affiliation(s)
- M. Trumm
- Institut für Nukleare Entsorgung (INE)
- Karlsruher Institut für Technologie
- D-76131 Karlsruhe
- Germany
| | - C. Wagner
- Institut für Nukleare Entsorgung (INE)
- Karlsruher Institut für Technologie
- D-76131 Karlsruhe
- Germany
- Ruprecht Karls Universität Heidelberg
| | - B. Schimmelpfennig
- Institut für Nukleare Entsorgung (INE)
- Karlsruher Institut für Technologie
- D-76131 Karlsruhe
- Germany
| | - A. Geist
- Institut für Nukleare Entsorgung (INE)
- Karlsruher Institut für Technologie
- D-76131 Karlsruhe
- Germany
| | - P. J. Panak
- Institut für Nukleare Entsorgung (INE)
- Karlsruher Institut für Technologie
- D-76131 Karlsruhe
- Germany
- Ruprecht Karls Universität Heidelberg
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Trumm M. [Unilateral systemic sebaceous nevus]. Z Hautkr 1977; 52:352-3. [PMID: 860556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Trumm M. [Recurring and metastasizing hemangioendothelioma of the scalp]. Z Hautkr 1977; 52:319-20. [PMID: 860543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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